A superb location slap bang in the heart of one of the most expensive areas of bangkok. Located alongside a string of five star hotels and most importantly for the city (as the traffic is always in gridlock) the BTS sky train. You're also then a short distance away from the shopping at Central World and Paragon. Many tourist sights are then easily reachable to the river on the train. I lived in Bangkok for ten years and consider their apartment to be unbeatable value for money for this pricy location.
Hermann and his wife were welcoming and made the check in and check out effortless and efficient.
The apartment is large (for the area) and well supplied with lots of nice touches, such as the Nespresso Machine. It's also quiet. No Bangkok traffic noise. You can't hear the train and not a peep from the neighbors. The security is good.
If you wish to stay somewhere that feels like somebody's apartment rather than just another bland hotel room then this is a good choice.